Grammar fix for "git merge" man page

As spotted by the eagle eyes of Jeff King.

Signed-off-by: Wincent Colaiuta <win@wincent.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-merge.txt

@@ -40,7 +40,7 @@ include::merge-options.txt[]
 include::merge-strategies.txt[]
 
 
-If you tried a merge which resulted in a complex conflicts and
+If you tried a merge which resulted in complex conflicts and
 want to start over, you can recover with 'git-reset'.
 
 CONFIGURATION